Resilient wheel



Q JamZO, 1942. BURTON -f 2,270,622

' RESILIENT WHEEL Original Filed July 20, 1939 PIE. 1..

. 112097150719: 4 Che/ 2044 BURTON and 000 445 P. STEM/490.

Patented Jan. 20, 19:42

STATES RESILIENT WHEEL Original application July 20, 1939, Serial No.285,629. Divided and this application August 1, 1940, Serial No. 349,178

2 Claims.

This application is a division of our application Serial No. 285,629,filed July 20, 1939, for Resilient car wheels, and relates primarily towheels employed with rail borne vehicles and to new and improved methodsof resisting radial and torsional movement of the several parts of thewheel assembly with reference to each other, without which means theresilient feature of the wheel could not function efiiciently inreducing the noise and the shocks normally transmitted from rail throughwheel to axle and truck.

-Heretofore, resilient wheels of the prior art have embodied resilientmembers held between rigid members in some convenient way. Suchconstructions, however, were not positive in maintaining proper assemblyconditions as they depended largely on metal-to-metal friction, or

rubber-to-metal, induced by assembly pressure, which latter varied fromtemperature variations or inaccurate sizing of the component parts ofthe wheel. It is true that good results' could be obtained by very closepart tolerances, but

- such were costly and impracticable to produce commercially.

' In addition, the abutting contact in such constructions, of metallicparts with resilient members, produced a condition of easy transfer ofbraking heat through the metallic parts to the resilient members, withthe result that said resilient members deteriorated prematurely fromsuch excessive heat.

One of the objects of our invention is to provide means whereby auniformly distributed assembly pressure can be applied to the wheel overthe area of the resilient members which will not be afiected byconditions of climatic temperature variations. Another object is toprovide means whereby radial movement of the several wheel partsrelative to one another will be positively prevented. An importantobject is to incorporate means whereby the transfer of excessive brakisdesigned to turn therewith. The hub l carries two transversely spaceddisks 2 and 3, the

disk 2 engaging a shoulder on the hub as shown and being made integralwith the\ hub by the welded joints 2* shown or by being cast or forgedintegral with the same. The disk} is aseparate member secured-to the endface of the hub opposite the shouldered portion. Both disks are providedwith axially aligned spaced holes through whichthe shanks of theseparator bolts I2 pass to hold the assembly in rigid compressedcondition. The bolts as shown are threaded at their right extremitiesand are screwed into the disks 2. As illustrated at the right hand sideof Figure 1, the right extremity of each bolt I2 is screwed into atapped hole in the disk 2; The axial hole at the center of the disk 3 issmaller than the central hole in the disk 2 so as to matchthe size ofthe central bore of the hub. The inner face of the disk 3 abuts the leftface of the hub, and a series of tap bolts I6,

to the resilient core 9. The face plates 1 have their outer peripheriesformed with outturned flanges I0 which are'so dimensioned as to closelycontact the outer peripheries of the disks 2 and 3. The inner ,faceplates 8 have their in-, ner peripheries formed with face' plate flangesI l which are so dimensioned as to closely contact the edges of thecenter hole 24 in the rim web 5.

The face plate flanges I0 and I I serve to aid in centering theresilient members 8 with ref- 'erence to the disks 2 and 3, as well aswith the web 5, thereby ultimately positioning the face of the rim 4concentric with the hub bore. In addition, face plate flanges ill and IIaid in resisting radial movement of the resilient members 6 withreference to the disks 2 and 3 and the rim web 5.

The coaxiall opposite resilient members 6 are provided with a pluralityof oppositely spaced holes in their outer face plates 1 which closelycontact the shanks M of the separator bolts I2 in order to resisttorsional movement of the disks 2 and 3 with reference to resilientmem=- bers 6. 7 7 Therim web 5 is provided with a series'of holes a 2!whose centers coincide with holes 28 in outer face plates "I and holes2] and 21" in the disks 2 and 3 through which the extremities of thebolts l2 extend.

The separator bolts l2 are provided adjacent each end with integralcollars [3 which contact the inner faces of the outer face plates 1, sothat when pressure from the shoulder bolt nuts I! ;is applied, the outerface plates 1 will be tightly pinched between the collars l3 and thedisks 2 and 3, thereby minimizing any chance for figment betweenresilient members 6 and the 2 and 3. The shoulder bolts 12 also, by theaccurately spaced collars l3, insure uniform preson the resilientmembers 6 when the wheel is properly assembled.

. he clearly indicated in the drawing, an annular disk of suitablenon-metallic friction material 20 is located on each side of the rim web5, and between it and the ixmer face of each of the respective plates 8.The function of the friction material 20 is dual in that it eliminates,when coupled with proper assembly pressure, torsional movement betweenthe rim web and resilient members 6, and also minimizes the transfer ofheat generated by braking on the rim 4, from the rim web 5 to resilientmembers 6. The latter claim is based on the fact that most eflicientfriction materials, of non-metallic composition, have certain heatinsulating values. However, in order to insure proper rotatableassembly, it is advantageous to provide a plurality of accuratelylocated assembly holes 23 which extend through all members of theassembly from side to side, into which aligning pins 22 may be'insertedwith close fit when the wheel is assembled. These .pins may also beemployed for the purpose of holding the wheel parts in accuratealignment when it becomes necessary to true up the rim by machining orgrinding without the necessity of dismantling the same.

When the wheel is used in street car service or in other railway servicewherein current is conducted through the rails over which the wheeltravels, suitable flexible electric connections will be provided forproperly conveying current through the rim 4 via the web 5 to the huh I,

which is assembled in electrically conducting relation with the usualcar axle. From the foregoing it is apparent that our invention providesdetail features of wheel construction. Inherent improved characteristicfeatures hereinabove-set forth.

We claim:

1. A wheel comprising a rim with an inwardly extendingweb having anaxial opening therein, a hub extending freely through said opening andhaving a shoulder near one end, a disk abutting said shoulder andsecured to the hub by a weld seam, a second disk abutting the hub faceopposite said shoulder, means for securing said second disk in abuttingrelation to said hub face, respective annular resilient units disposedbetween each of said disks and said web, each of said units comprisinginner and outer annular face plates between which are disposednon-metallic cushions of resilient material, each outer faceplate havingan outtumed flange overlapping the outer pe-- ripheral edge of the diskadjacent thereto and each inner face plate having an .inturned flangeoverlapping and snugly engaging the wall of the central axial opening ofthe web, the web and the inner face plates being provided with enlargedholes, bolts extending freely therethrough, the outer portions thereofmaking-a snug fit with openings formed in the outer face plates and theplate and the adjacent face of said web a layer of friction material.

2. A wheel comprising an outer rim with an inwardly extending web havingan axial opening therein, a hub extending freely through said openingand carrying spaced risks positioned on opposite sides of said web,respective annular resilient units disposed between each of said disksand said web, each of saidunits comprising inner and outer face platesbetween which are disposed non-metallic cushions of resilient material,each outer face plate having an outtumed flange overlapping the outerperiphery of the disk adjacent thereto and each inner face plate havingan inturned' flange overlapping and snugly engaging the wall of thecentral opening of the web, the web and the inner face plates be1u8provided with a series of enlarged holes, bolts extending freelytherethrough, the outer portions of said bolts making a snug flt withthe openings formed in said outer plates and disks, each of said boltshaving respective shoulders engaging the respec-' tive outer faceplates, means carried by said bolts securing the resilient units incompressive rela- CARROLL BURTON. DOUGLAS P. STEWARD.

